Which statement is correct regarding infection and intoxication in foodborne illness?

• A. Intoxication requires growth of the pathogen in food
• B. Infection always involves toxins produced in the food
• C. Intoxication can occur without any toxin production
• D. Infection may occur without the pathogen growing in food

Answer: (D)

In foodborne illness, infections come from viable microorganisms that must be ingested and then multiply in the host, whereas intoxications are caused by toxins that have already been formed in the food and are ingested with it. The best statement reflects that an infection can occur even if the pathogen did not grow in the food, because the organism can survive the stomach and multiply in the intestines after ingestion, causing illness regardless of its growth in the food itself.

This distinction matters because toxins in intoxication are the offending agents, typically formed during growth in food, while infection centers on the live organism successfully multiplying inside the consumer. The other options conflate or misunderstand these mechanisms: infection does not always involve toxins produced in the food, and intoxication by definition involves toxin production.